Alfa 156 2.0TS (ME3.1), immo reset/disable

[Zulak]

Hello,

I have purchased second hand ECU and now I have a problem with im*o of course. I'd like to get an original file of the ECU to reset it to virgin mode if possible. Another option is to disable the im*o completely.

Car: Alfa Romeo 156 2.0TS Selespeed (-00)
ECU type: Bosch Motronic ME3.1
ECU number: 0261204949
Software number: 1277356500

Thank you very much for any help!

[ilian_cho]

If you have the original ecu, just remove the epprom to the new one.

[Zulak]

If you have the original ecu, just remove the epprom to the new one.

If you have ever opened a ME3.1, you know it's impossible.



I have the original ECU available and it's still working somehow. I have the hex-files from both ECUs if necessary..

[Zulak]

I tried to locate the eeprom for im*o in the ME3.1 ECU.

Here is a photo of the ECU.




This is the chip I found and the pinout I think is correct. Please check and correct me if I'm wrong.



Thank you!

[kasim_izmir]

I tried to locate the eeprom for im*o in the ME3.1 ECU.

Here is a photo of the ECU.




This is the chip I found and the pinout I think is correct. Please check and correct me if I'm wrong.



Thank you!

Who can read and write eeprom from this ecu
i can pay for this procedure ?????

BR
kasim

[darwins]

Any one have a virgin reset solution for this ECU ?
I'm happy to pay for your knowledge!

Thanks

Darwins..

[kugglefischer]

GOT question...
whats the spots marked SDA, AND SDL.....??

Thnaks

ps...nice pics!

[Zulak]

Here is also the hex file from both of the ECUs.

[losiosmak]

How to reset autoadaptation in this ECU (ME3.1)?? In M1.5.5 is 0xFE command, but doesn't work with ME3.1

[Zulak]

How to reset autoadaptation in this ECU (ME3.1)?? In M1.5.5 is 0xFE command, but doesn't work with ME3.1

I had the same problem earlier. I used a lot of time to search for a method to reset this adaptive values but I didn't find any solution. I tried to send lot of different requests via KWP2000 protocol. If you want, I have the fiat document available for the communication.

Anyway, my problem was the Idle control adaptive value which was very high (2.02) because of faulty throttle body earlier. After throttle was changed, this value remained the same and idling was very high (>2000rpm) and oscillating sometimes.

I drove maybe 5000km without any change and finally changed some other faulty parts and this value started to decrease automatically. Faulty parts were gas pedal (another potentiometer signal not stable) and thermostat. My conclusion is that this value is not automatically adjusted if the engine controller is not in a normal state (fault code or temperature below regular).

For a while my idling was ok but now it's very stable 0rpm because of broken immo.

[losiosmak]

In my Bravo (2.0 HGT, 1999y, Motronic ME3.1) reseting autoadaptation of motorized buterfly casing is very simple. Just disconnect buterfly casing for 30min. Then connect, switch key to ON position (do not start an engine, only switch on power) for 60sek, then switch to off for 10sek and start an engine.

During this 60sek in first 30sek climate control will check min/max position of hot/cold air actuator and in second 30sek you'll hear baterfly casing checking min/max position.

Problem is to reset TRA (multiplication factor) and FRA (additional factor). These two modificates engine characteristic.

[Meat-Head]

there was a simular thread on here a while ago, and the user linked a pdf file which was a credit card eeprom, but would like to see it, but can't find it, did try searing, but no luck!

Nice photos, impreased with your work, well done.

[Zulak]

In my Bravo (2.0 HGT, 1999y, Motronic ME3.1) reseting autoadaptation of motorized buterfly casing is very simple. Just disconnect buterfly casing for 30min. Then connect, switch key to ON position (do not start an engine, only switch on power) for 60sek, then switch to off for 10sek and start an engine.

During this 60sek in first 30sek climate control will check min/max position of hot/cold air actuator and in second 30sek you'll hear baterfly casing checking min/max position.

Problem is to reset TRA (multiplication factor) and FRA (additional factor). These two modificates engine characteristic.

Yes, this is correct. It will calibrate the throttle valve again after this "reset" but adaptive value for idle control is not reset. You can check this by yourself with diagnostics software.

[ivo1404]

I had the same problem earlier. I used a lot of time to search for a method to reset this adaptive values but I didn't find any solution. I tried to send lot of different requests via KWP2000 protocol. If you want, I have the fiat document available for the communication.

Anyway, my problem was the Idle control adaptive value which was very high (2.02) because of faulty throttle body earlier. After throttle was changed, this value remained the same and idling was very high (>2000rpm) and oscillating sometimes.

I drove maybe 5000km without any change and finally changed some other faulty parts and this value started to decrease automatically. Faulty parts were gas pedal (another potentiometer signal not stable) and thermostat. My conclusion is that this value is not automatically adjusted if the engine controller is not in a normal state (fault code or temperature below regular).

For a while my idling was ok but now it's very stable 0rpm because of broken immo.

I know this is few years old but do you still have the document for reseting adaptive value for throttle or remember the procedure. Alfa Romeo 156 2.0 selespeed Bosch Motronic 3.1 electric throttle body.
Thanks

[injectorlab]

Pls, explain in detales, how these digits E9, E5, 43 are obtained from those 42369? What algo is used.